Compressor



. 1,635,523 @guly 1927' E. WILSON COMPRESSOR Filed March 22. 1926 4 Sheets-Sheet 1 /74 e/776n iawma 1427M,

5! 12, 1927' I E. WILSON COMPRESSOR Filed March 22. 1926 4 Sheets-Sheet Wye/7707? iii 1 am? 149/760,

1,635,523 July 12, 1927- E. WILSON COMPRESSOR Filed March 22, 1926 4 Sheets-Sheet 4 ';P lllll -i\\\\illlllllllllllllllllll uumnummu mlllllil -Patented July 12, 1927.

"UNITED ,sTATEs PATENT OFFICE.

nnwann wmson, or s1. Lou s, mssounn-assrenon' no man Nair-Iowan run? & conrnnsson comm, or sr. LOUIS, iuIssoUnI, A conrom'rlon or DELAWARE.

comrnnsson.

Application filed March 2a, 1925. Serial m. 96,871.

This invention relates to compressors, and is adapted. formany uses and especially adapted for use as a refrigerating machine.

An object of' the invention is to provide an im rovedcompressor designed and adapts for operation for many purposes,

- and includingzajstationary housing supporting a' rota" -shaft having a rotor attached thereto. wit 'n the' housing and supporting a rotor cylinder in floating relationship to.

' the shaft andprovided with equipment for.

' tured" at comparatively efiectin'g compression of the air or gas and. discharging t e compressed air or gas. into the housing.

Anotherobjectof the invention is to pro-- Vide an improved'compressor in which the rotor and a. rotorcylinder in which itfis enclosed are maintained in the proper cooperative relationship to effect compression of the air or gas as an incident to the operation'of the rotor. I

Another object of the invention is to rovide'animproved compressor of simplified construction that is big ly eincien't in operation, durable; I and which may be manufacthe existing need all .public demand for, such a machine. l Other objectsofj the, invention will ap pear from the "following description. refer ence being made to the accompanying drawin sin which- -x I s ig. 1 is'averticallongitudinal sectional view of my improved compressor.

Fi 2 is a-vertical cross sectional view approx1matelyon the line 2'2 of Fig. 1.

. i Fig. 3 is a sectional view approximately Fig. 7 is an end elevation of; the piston late. i p The housing of the machine comprises a lower. housing member 1 having a supporting member 3 the lower edgeo low cost to supplyelevation of the cylinder ing flange 2 which, when placed upon a supporting base, forms a confined chamber adapted'to' contain. water as a cooling medium for the machine; and an upper houswhich is seated .upon the upper edge'of the lower housing member'to orm a housing the. compressor mechanism. A shaft .4 is. journaledin anti-frictipn;

enclosing bearings 5 mounted in the end walls of the ment in either direction 'by shoulders .6-

against the-inner sides of saidbearings. -To

one end of the housing a. chamber 7 is'a-ttached and supports a sealing device around the shaft 4' comprising a shouldered cylindrical member 8 having its inner end engaging the-inner rin of the anti-friction bearing 5. The mem er 8 is held'in place by a ring 9 against the outer end thereof.

. and a nut 10 screwed on-the shaft. Sealing I rings 11' encircle thereduced portion of the member 8 and by lateral contact with said member 8 and with rings 12 and by e ripheral contact 7'formaseal. I J H A similar sealing device to the parts of which like reference characters are applied. is'provided adjacent to'the bearing {Eat .the opposite'en-d of the housing, the rings 11" of the second sealing device contacting with the inner wall of the chamber 13. An inlet pipe 14.- opens into thev chamber to admit thereto the air or gas to be compressed. The

shaft 4 extends-into the chamber-13 and is [hollow from said end a suflicient distance to form a passage to admit into the compressor the air or gas to be compressed. A valve disc 15 has a stem 16 operating in a guide .17 and. is movable to and from position to open and to close the inlet opening. 18 to the'chamber 13. A pi e19 0 ns into the chamber 13 through t e gui e 17 and a port 20. I

The rotor shown rotates with the shaft 4 within the housin of the machine. rotor. is of improve construction comprisin a-hub 21, a circumferential flange or housing and is held from longitudinal move:

with the wall of the housing The we 22 integral'with the hub approximately midway of its length,.a cylinder 23 integral with the fiangeor web 22, and a series of webs 24 integrally connecting the hub 21, the

4 larger inside diameter than the outside ferential diameter of the rotor cylinder 23 is sup-.

ported upon the upper peripheral portion of and surrounds said cylinder 23 (Fig. 2). -Within the cylinder 25 at each end of the rotor an annular trunnion plate 26 is mounted, said trunnion plates bearing against the ends of the rotor cylinder 23 and having their peripheries within ooves 27 in the cylinder 25. The trunnion plates 26 are pressed inwardly against the rotor cylinder 23 by springs 28 interposed between the trunnion plates and end plates 29 attached to the cylinder 25 by .bolts 30 passing throu h the end plates 29 and circum anges 31 on the cylinder 25. 'The rotor is provided with a radial slot 32 in which a piston plate 33 is mounted and has its-outer .edge'held in contact with-the iston. plate cylinder 25. The ends of the earings 35 have trunnions 34 mounted in 'in the trunnion plates 26. Packing or sealing strips 36 are mounted in a groove in the outer edge ofthe piston plate 33 and, by contact with the inner surface of the cylinder 25,form an impervious joint. The ends of the piston plate 33 fit closely against the inner surfaces of the trunnion plates 26 and.

35. The rotor. is provided with a counterbalprevent the passage of air or gas between said parts.

ance weight 37 diametrically opposite from the heavier part 38 of the rotor in which the piston plate 33 is mounted and the inlet and outlet passa es are formed as hereinafter described. 0, too, the trunnion plates 26 are provided with weights 39 diametrically opposite from and counterbalancing the piston plate 33. v

A yoke ,40 extends longitudinally above the cylinder 25 and has a-pair of depending arms 41 at each end (Fig. 3) embracing an thrustin u .on ant1-friction bearings 42 mounte on fiub portions 43 formed integral with and extending outwardly from the end lates 29. Springs 44 (Fig. I) mounted in iiollow spring seats 45 ress upon the yoke 40 causing the yoke to old the cyl nder 25 close against the rotor 23. The spring seats 45 are screwed in threaded ho es 111 the upper housing member'3 and, because of such arrangement, may be adjusted to vary the tension of the springs 44. screwed upon the extended. en s of the sprin seats 45 and, by pressure upon packobtain hermetic oints. rom the bore in the shaft'4 a passage 48 opens into a passage 49 through the rotor. The passage 49 intersects the periphery of the rotor near the rear side of the piston Ca 5 46 are' plate 33. As. seen in Fig. 2 the rotor turns in a counterclockwise direction so that as the area of the space at the right of the piston plate diminishes compression is obtained. Asxthespace at the'right of the piston plate 33 diminishes the space at the left increases in volume, becoming filled'with air or gas. \Vhen the piston plate passes beyond Ethe upper vertical radius 'of the rotor the air or gas that had entered through the passage 49 is continuously and successively compressed and forced through a valve 50 into the rotor, and thence through the openings in the trunnion' plates 26 and the cylinder end plates 29. into the housingf the machine.

. To maintain the yoke 40 in proper relationship to its associated parts guides 51 (Fig. 3) are screwed in threaded parts 52 of the machine housing at the outer sides of the respective arms 41 of the yoke. These screws hold the yoke. centered and permit free op-' eration of the yoke. The guides'51 may be firmly held in their adjusted positions by lock screws 53 and the .openings may be hermetically sealed by pipe plugs 54 screwed in the outer ends of the parts 52.

The-compressed air or gas is conducted from the machine through an outlet pipe 55. From the foregoing and by reference to Figs. 1 and 2, it will be understood that as the rotor turns in a counterclockwise direction air or gas is drawn into the machine through the inlet pipe 14 and through the several passages comprising the hollow shaft 4, slot 48 and passage 49, to the space between the rotor and the cylinder 25. As the rotor continues to rotate in a counterclockwise direction the. air or gas is compressed and forced through the valve 50, and

This machine may be manufactured at comparatively low cost and sold to meet an existing public need for an inexpensive re frigerating machine and other purposes.

. The parts and assembly are not complicated. Theyare of strong construction and too durable quality and'may be maintained in proper cooperative relationship without difficulty. be varied within equivalent limits without The structure of the machine'may departure from the nature and principle'of the invention, as set forth in the appended claims.

What I claim and desire to secure by Letters Patent is 1. A compressor comprising a rotor, a cylinder enclosing and supported by the rotor,

a yoke supported by the'c linder, and devices exerting pressure u 'on t e-yoke in a direction to press the cy inder against the rotor.

2.. A compressor comprising a rotor, acylinder enclosing and-supported by the rotor, ayoke supported by the cylinder, devices exerting pressure uponthe oke in a direction to press the cylinder agamst the rotor, and guides between which said yoke is movable.

3. A compressor comprising a rotor,a cyl inder enclosing and supported by the rotor, hubs extending from the ends. of said cylinder, and a yoke supported 'by said hubs and exerting-pressure thereon in a direction to press the cylinder against the rotor.

4. A compressor c omprisinga rotor, 9. cylinder enclosingoand supported by the rotor, hubs extending from the nds of said cylinder, a yoke supported by said hubs and exerting pressure thereon in a directionto press the cylinder against the rotor, and devices exertlng pressure against said oke in a dlrection topress said cylinder against the rotor.

5Q compressor comprising a rotor, a cyl inder enclosing and supported by the rotor, end plates attached to the cylin er, annular plates between said end plates and the ends of the rotor, a'spring between each end plate and the adjacent annular plate pressing said annular plate against the end of. the rotor, and a device supported by saidend plates pressingthe cylinder against the rotor.

6. A compressor comprising a rotor, acylinder enclosing and supported by the rotor, end plates attached to the cylinder, annular plates between said end plates and the ends of the rotor, a spring between each end plate .and the'adjacent annular plate pressing said annular plate against the end of the rotor,

a device supported by saidend plates press- I mg. -the cylinder against the rotor, and springsexerting pressure upon said device in a direction to. press the cylinder-against the rotor..

'7."A com ressor comprising a housing, a hollow sha 'journaled for rotation in said housing, sealing devices betweensaid shaft and the Walls of said housing, a rotor attached to said shaft in saidhousing, a cylleaving spaces between the rotor and the cylinder enclosing and supported by said rotor and beingiof larger diameter than said rotor inder on opposite sides of the place of contact of said cylinder'with said rotor, annular plates between the ends of said cylinder and said rotor, a passage forminga com: municatlon from said hollow shaft" to said space between said cylinder and rotor, and a leaving spaces between the rotor and the cyl-v means for inder on opposite sides of the place of'contact of said cylinder with said rotor, annular plates between the ends'ofsaid cylinder and said rotor, a passage forming a communication from said hollow shaft to said space between saidcylinder and rotor, a piston supported by said plates effecting compression and forcing the compressed medium from said'space into said housing outsideof said cylinder, and yielding devices pressing said cylinder into contact with said rotor.

9. A compressor comprising arotor, a rotary cylinder enclosing and supported wholly by the rotor, a yoke supported by the cylin-- der, anddevices exerting pressure upon the yoke in a direction to press the. cylinder against the upper side ;of the rotorv leaving a space between thelower side of .the rotor and the cylinder. 7 l

10. A compressor comprising a rotor a rotary cylinder enclosing and supported each end wall,'a bearingsupport upon each 'of said extensions, and a yoke pressing pressing the 'cyl-- against said bearings and inder against the rotor.

11; A compressor comprising. a rotor, a

by the" rotor and'having an outward extension from rotary cylinder of larger internal diameter than the external diameter ofthe rotor en; closing and supported by the rotor, 'a yoke su portedby the cylinder and pressing the cy inder-into contact with the rotor, and

means holding the yoke from turning with the cylinder. 4 I

12. A compressor comprising a rotor a rotary (:ylinder'eccentrically 'enclosing'and sup: ports wholly by the rotor, means for pressng'the cylinder into contact with .the rotor,

and a stationary housing enclosing all of said parts. Y

13. A com ressor comprising a rotor, a rotary cylin er eccentrically enclosing and supported by the rotor, a piston in connection with the rotor and extending across the space between the rotor and the cylinder lnto contact with the cylinder, means for operating said piston, means'for admitting air or gas through the rotor into the space between the periphery of the rotorand the cylinder,

positively rotating the rotor leav- I ing the cy nder to be turned bill by frictional contact-with the rotor, van a s ring actuated element for pressing the cylinder into contact with the rotor.

14. A'compressor comprising a rotor, a cylinder eccentrica'lly enclosing the rotor and being wholly supported by bearing upon the upper perip eral portion of 'the rotor, a

shaft extending through the cylinder and the rotor, and being wholly out of contact withthecylinder, bearings supported by the cylinder, a yoke pressing against. said ear ings in a direction to press the cylinder against the upper peripheral portion of the rotor.

" the rotor, a piston 15.- A compressor comprising a rotor, 'a cylinder eccentrically enclosing the rotor and being whollysupported" by bearing upon the upper peripheral portion of the rotor, a shaft extending through the cylinder and the rotor and being wholly out of contact with the cylinder, bearings supported b the cylinder, a yoke pressing against said earings in a direction to press the cylinder against the upper peripheral portion of the rotor, means for conducting air or gas through said shaft and through the rotor to the space between the periphery of the rotor and the cylinder, and a iston extending from the rotor'to the perip cry of the cylinder. a

v 16. A compressor comprising a shaft; a hub attached to said shaft; a circumferential web integral with said hub' intermedicylindrical portion concenate of its ends; a trio with said sha t and integral with sa d web; radial webs integral with said hub, said circumferential web and said cylindrical portion; a cylinder eccentrically enclosing and supported by said cylindrical portion;

spring actuated devices for (pressin said cyl-' inder into contact-with sai cylin rical portion at their upper sides leavin a' space hesaid cylinder; and means for effecting com-.-

tween said cylinder and said cylindrical portion'at the sides of their line of contact; means for conducting air or gas into the space between said cylindrical port on and pression of the airor gas.

* end of said rotor within said cylinder, re, si'lient elements pressing said plates toward 17 A compressor comprising a rotor shaft, a rotor attached to said'shaft, a rotary cylinder je'ccentrically enclosing and supported by said rotor, an annular plate at each connected with said plates and movable radially within the rotor and retained 'n permanent contact with the inner periphery: of the cylinder, bearings supported by the cylinder, a yokesupported by I said bearings, guides for said yoke, and;

springs pressing said yoke against said-bearing's. H

18.'A compressor comprising a rotor, a

= cylinder oflarger internal diameter than the external diameter of the rotor supported eccentrically by the rotor, a piston operatively connected with the rotor and maintained in permanent contact with the inner periphery of the cylinder, a yoke wholly supported by i the cylinder, and springs pressing upon said yoke.

19. A compressor comprising a rotary cyl- .1 inder, a rotor within and supporting the cylinder in eccentric relationsh p thereto, a pair of annular plates between which the rotor is mounted, a radial piston connected with said plates and movable radially within the rotor and maintaining permanent, contact with the inner periphery of the cylinder, a passage through the rotor intersecting the periphery through the rotor at the opposite side of said piston, and a housing enc osing'all ofsaid parts and bein in communication with the valve controlled passage.

21. A compressor comprising a housing, a

rotor shaft supported by'the housing, a rotor attached to the shaft within thehousing, a rotary cylinder supported eccentrically, by

ed by said cylinder, and a yoke pressing against said bearings.

22. A compressor compbrising a housing, a rotor shaft supported rotor attached to the shaft within the housing, a. rotary cylinder supported eccentrically by the rotor, bearings mountedon and supported'by saidcylinder, ayoke pressing -the rotor, bearings mounted on and supportythe housing, a

against said bearings, guides for the yoke, I

and springs pressing the yoke against said bearings.

23. A compressor comprising a rotary shaft, acylinder, mechanism 'mounted' on the shaft within the cylinder supporting the cylinder in-eccentric relationship toand wholly out of contact with the shaft, and'means for effecting compression within said cylinder when said shaft and said mechanism are rotated, v

24. A compressor comprising a rotary shaft, a cylinder, mechanism mounted on'the shaft within the cylindersupporting the c inder in eccentric relationship to and Who lfy out of contact with the shaft, means for e fecting compression within said cylinder when'said shaft and said mechanism are rotated, a oke holding the cylinder in proper relations ip to the otherparts, and 'springs' pressing upon said yoke,

- 25. A compressorcompr sing a housing, a A

.shaft rotatively supported by said housing, a cylinder. within said housing, and compressor mechanism within said cylinder driven by said shaft and supporting said cylinder in eccentric relationship-wand out o of contact with 'said shaft.

26. A compressor comprising a housing, a

shaft rotatively supported bysaid housing,

a cylinder within said housing, compressor mechanism within said cylinder driven by said shaft and supporting said cylinder in eccentric relationship to and out of contact with said shaft, and a passage for conducting air or gas between the compressor niech anism and the cylinder.

'27. A compressor comprising a housing, a

shaft rotatively supported by said housing, a cylinder within said housing, compressor mechanism within.said cylinder driven by said shaft and supporting said cylinder in shaft rotatively supported by said housing,

a cylinder within said housing, compressor mechanism within said cylinder driven by said shaft and supporting said cylinder in eccentric relationship ,to and out of contact with said shaft, a passage for conducting airor gas between the compressor mechanism and the cylinder and therefrom into the housing :outside of the cylinder, and means said yoke.

forming a seal between the shaft and the housing.

29. compressor comprising a housing, a shaft rotatively supported by said housing, a sealing device between the shaft and the housing, a cylinder within said housing, mechanism cooperating with said cylinder and driven by said shaft and supporting said cylinder in eccentric relationship to and out of contact with said shaft for effecting compression byrotation of said shaft, a yoke supported by said cylinder, and elements exerting pressure against said yoke to maintain propercooperative relationship between said cylinder and said mechanism.

30. A compressor comprlsing a housing, a shaft rotatively supported by said housing, a sealing device between the shaft and the housing, a cylinder within said housing, mechanism cooperating with said cylinder and driven by said shaft and supporting sald cylinder in eccentric relationship to and out of contact with said shaft for effecting compression by rotation of said shaft, a yoke supported by said cylinder, elements exerting pressure against said yoke to maintain proper cooperative relationship between said cylinder and said mechanism, and guides for said yoke preventing lateral vibration of 31. A compressor comprising a housing, a shaft rotatively supported by said housin sealing means between said shaft and said housing, a cylinder rotative within said housing and out of contact with said shaft, mechanlsm attached to said shaft within said cylinder and supporting said cylinder in eccentric relationship to said shaft and said mechanism, and passages for conducting air or gas between said mechanism and said cylinder and from between said mechanism and said cylinder into the housing outside of said cylinder. I

32. A compressor comprising a housing, a shaft rotatively supported by said housmg, sealing means between said shaft and said housing, a cylinder rotative within said housmg and out of contact with said shaft, mechanism attached to said shaft within said cylinder and supporting said cylinder in eccen tric relationship to sa id shaft and said mechanism, passages for conducting air or'gas between said mechanism and said cylinder and from between said mechanism and said c linder into the housing outside of said cylmder, and yielding devices for maintainin proper contact between said cylinder an said mechanism. Y 33. A compressor comprising a housing, a shaft rotatively supported by said housing, sealing means between said shaft and said housing, a cylinder rotative within said meehanism attached to said shaft within said cyhnder and supporting said. cylinder in cccentric ,relationship to said shaft and said mechanism, passages for conducting air or gas between said mechanism and said cylinder and from between said mechanism and said cylinder into the housin outside of said cylin er, yielding devices or maintainin proper contact between said cylinder an said mechanism, and means for preventing lateral displacement of said devices.

34: A compressor comprising a rotary shaft, a cylindrical rotor attached to said shaft, a' rotary cylinder supported by said rotor in floating and eccentric relationship to said shaft, means for conductin air or gas between said rotor and said cyfinder, a piston in connection with said rotor contactin with the interior periphery of said cy inder, .a valve controlled passage for conducting air or gas from one side of said rotor through said-rotor and said cylinder,

and a housing confining the parts aforesaid.

35. A compressor comprising a housing, a rotary shaft extending through said housin bearin s supported by said housing in whic shaft s aft is journaled, hermetic sealing devices between said shaft and said housin preventing escape of air or gasfrom said housing, a rotor attached to said shaft within said housing, a cylinder supported in eccentric relationship to said rotor "and in eccentric and floating relationship to said housing and out of contact with said shaft shaft, means for effecting compression within said cylinder when said rotor is rotated by said shaft, and means for conducting the compressed air or gas from within said cylinder to said housing outside ofsaid cylinder.

36. A compressor comprising a housing, a rotary shaft extending through said housing, bearings supported by said housing in which said shaft is journaled, hermetic sealingdevices between said shaft and said housing Y tact with said rotor and permitting shaft, a rotor attached to an preventing escape of air or gas fromsa d housing, a rotor attached to said shaft within said housing, a cylinder supported n eccentric relationship to said rotor and in eccentric and floating relationship to said shaft,-

means' for eflt'ect n compression within'said c linder when said rotor is rotated by said shaft, means for conducting the compressed air or gas housing outside of said cylinder, and devices for pressing said cylinder in close contact air or gas from within sai cylinder to said 7 housing outside of said cylinder, and de-,

vices for pressing said cylinder in close condifferential rotation of said rotor and said cylinder.

38. In a compressor, the combination of a rotor having a radial slot, a piston plate mounted in said slot for radial movements therein, a trunnion plate operatively' connected with said piston plate at each end of the rotor movable eccentrically with respect to the rotor, and a cylinder enclosing the rotor and said trunnion plates and efl'ecting relative movement of the trunnion plates and the rotor'to move said piston plate.

39. A compressor comprism a rotary concentric with the shaft, and having a radial slot, a trunnion plate at each end of the rotor, a piston plate in said slot connected with said trunnion plates and movable thereby radially in said slot and a cylinder enclosing said rotor and sa1d trunnion lates and having independent rotative an floating relato said shaft.

compressor comprisin a rotary shaft, a rotor attached to an concentric with the shaft, and havin a radial slot, a trunnion plate at each en of the rotor, a piston plat in said slot connected with said trunnion plates and movable therebyradially in said slot, and a cylinder enclosing said rotor and said trunnion plates and having independent rotative and floating relationsh 1 to said shaft and .arranged to operate sai trunnion plates in floating relationship to said shaft to move said piston plate.

41. A compressor comprising a rotary shaft, a rotor attached to said shaft and befrom within said cylinder to said ing concentric therewith and having a'radial slot, a trunnion plate at each end of said rotor in eccentric relationship to said rotor and to said shaft, a piston plate in said slot and connected with said trunnion plates, and a cylindersupported by and enclosing said rotor in eccentric and floating relationshi to said shaft and holding said trunnion p ates in eccentric relationship to said rotor and said shaft. v

42.'A compressor comprising a rotary shaft, a rotor attached to said shaft and be ing concentric. therewith and having a radial slot, a trunnion plate at each end of said rotor-in'eccentric relationshipto said rotor and to said shaft, a piston plate in said slot and connected with said trunnion plates, a cylinder supported b and enclosmg said rotor in eccentric and oating relationship to said shaft and holding said trunnion plates in eccentric relationship to said rotor and said shaft, and counterbalance weights in connection with said trunnion plates cooperative with said piston plate.

43. A compressor coinprisin a rotary shaft, a rotor attached to sai shaft and provided witha radial slot, a trunnion plate at each end of said rotor in eccentric relationship thereto and in floating relationship to said shaft, a piston late attached to said trunnion plates in sai slot, counterbalance structure for said piston plate in connection with said trunnion plates, and a rotativc cylinder enclosing said rotor and said trunnion plates in eccentric and floating relationshi to said. shaft.

d4. compressor comprising a rotary shaft, a rotor attached to said shaft and,

trunnion plates in said slot, counterloalance structure for said piston plate in connection with said trunnion plates, a rotative cylinder enclosing said rotor and said trunnion plates in eccentric and floating relationship to said shaft, and means for holding said cylinder in contact with said rotor and said trunnion plates.

45. A compressor comprising a rotary shaft, a rotor attached to said shaft and having a radial slot, a trunnion plate at each end of said rotor, a piston plate connected with said trunnion plates and being operative thereby in said slot,a cylinder enclos mg said rotor andsaid trunnion plates in eccentric relationshipto said shaft and said rotor, and being supported by said rotor in eccentric relationship to said shaft and said rotor, and in concentric relationship to said trunnion plates and controlling said trunmon plates to move said piston radially in said slot in said rotor.

46. A compressor comprising a rotary shaft, a rotor attached to said shaft and having a radial slot, a trunnion plate at each end of said rotor, a piston plate connected with said trunnion plates and being operative thereby in said slot, a cylinder enclosing said rotor and said trunnion plates in eccentricrelationship to said shaft and said rotor, and being supported by said rotor in eccentric relationship to said shaft and said rotor, and in concentric relationship to said trunnion plates and controlling said trunnion platesto move said piston radiall in said slot in said rotor; and means foriolding said cylinder in contact with said rotor.

EDWARD WHJSON. 

